Chocolate & cherry ring cake

Ingredients

• 35 grams (1.25 ounces) cocoa powder
• 90 milliliters (3 ounces) boiling water
• 140 grams (5 ounces) flour
• 4 grams (0.14 ounces) baking soda
• 2 grams (0.07 ounces) baking powder
• 1 pinch salt
• 90 grams (3.17 ounces) sour cream
• 85 grams (3 ounces) butter
• 190 grams (6.7 ounces) sugar
• 90 grams (3.17 ounces) eggs
• 225 grams (8 ounces) cream cheese
• 50 grams (1.76 ounces) sugar
• 60 grams (2.12 ounces) eggs
• 0.5 teaspoons (0.08 ounces) vanilla extract
• 80 grams (2.8 ounces) pitted cherries
• 70 grams (2.5 ounces) bitter chocolate
• 20 grams (0.7 ounces) vegetable oil